title: Long-term outcome of a metal-on-polyethylene cementless hip resurfacing.
abstract: Due to the well-documented problems surrounding metal-on-metal bearings, the use of hip resurfacing has declined. Since the potential benefits of hip resurfacing remain desirable, it may be beneficial to investigate the long-term outcome of hip resurfacings using metal-on-polyethylene in the 1980's. We report the long-term survivorship and modes of failure of a cementless metal-on-polyethylene resurfacing (n = 178) with different porous ingrowth surfaces. While acetabular loosening was absent, a high incidence of femoral failures (femoral loosening = 18.1%, osteolytic neck fracture = 21%) occurred despite using the same ingrowth surface for both components. Ongoing developments using the lessons learned from these previous generation components and utilizing modern low wear materials, e.g., cross-linked polyethylene, may lead to improved implants for future hip resurfacings.
authors.affiliation: David Geffen School of Medicine, University of California, Los Angeles; J. Vernon Luck, Sr., MD Orthopaedic Research Center at Los Angeles Orthopaedic Hospital, in Alliance with UCLA Department of Orthopaedic Surgery.
authors.forename: Timothy L
authors.initials: TL
authors.lastname: Tan
authors.affiliation: J. Vernon Luck, Sr., MD Orthopaedic Research Center at Los Angeles Orthopaedic Hospital, in Alliance with UCLA Department of Orthopaedic Surgery.
authors.forename: Edward
authors.initials: E
authors.lastname: Ebramzadeh
authors.affiliation: J. Vernon Luck, Sr., MD Orthopaedic Research Center at Los Angeles Orthopaedic Hospital, in Alliance with UCLA Department of Orthopaedic Surgery.
authors.forename: Patricia A
authors.initials: PA
authors.lastname: Campbell
authors.affiliation: Joint Replacement Institute at St. Vincent Medical Center.
authors.forename: Mariam
authors.initials: M
authors.lastname: Al-Hamad
authors.affiliation: Joint Replacement Institute at St. Vincent Medical Center.
authors.forename: Harlan C
authors.initials: HC
authors.lastname: Amstutz
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D001672:Biocompatible Materials; D005260:Female; D006621:Hip Joint / Q000601:surgery*; D006622:Hip Prosthesis; D006801:Humans; D007592:Joint Diseases / Q000601:surgery*; D008297:Male; D008670:Metals; D008875:Middle Aged; D020959:Polyethylene; D011474:Prosthesis Design; D011475:Prosthesis Failure; D016896:Treatment Outcome; D055815:Young Adult
chemical_list: D001672:Biocompatible Materials; D008670:Metals; D020959:Polyethylene
keywords: cementless; hip resurfacing; polyethylene; porous ingrowth; revision hip arthroplasty